Sash-cord fastening.



PATENTED OCT.. 24, 1905.

T. H.. KNGSTON SASH CORD FASTENING.

APPLICATION FILED Ilmo. 17, 1904.

i UialllTllElll STATES rnrnnr onirica.

@ASH-CORD FASTENlNC-Ti.

Specification of Letters Patent.

Patented Oct. 24, 1905.

Application filed December 17, 1904. Serial No. 237,253!` To /t/Z '11111/07111 it 'nw/lj con/ecrit:

Be it known that I, THOMAS HAvLocK KING- s'roN, a citizen of the United States, residing at Somerville, in the county of Middlesex and State of Massachusetts, have invented a new and useful Sash-Cord Fastening, of which the ,following is a specification.'

My invention relates to an insertible device by which the common window-cord is conveniently and quicklysecured in the sash; and it has for its objects to save cord and to economize time and labor in fastening it in the sash and to increase the durability of the sash at the place where the cord is attached.

I attain the objects stated by means of the device hereinafter more fully described, and illustrated in the accompanying drawings, in which- Figure l isa plan of the blank stamped from elastic sheet metal and from which the fastening is finished by properly forming the same. Fig. 2 is an end view of the device when completely formed from said blank into my improved cordfastening. Fig'. 3 is a perspective of the complete 'fastening'. Fig. 4 is a side View of a portion of a sash partly sectioned centrally throug'h the :fastening and the usual hole bored in the sash and showing the cord in the g'roove which leads from said hole and as gripped by the indentations of my fastening'. Fig. 5 is a cross-section through the cord and part of the sash, as on line 5 5, Fig. 4, and showing the indented edges of the fastening as inserted in the sash and g'ripping the cord between said edges. Fig. 6 is a View similar to Fig. 5, showing the fastening applied to a sash-chain, to which it is equally well adapted. Fig. 7 is a side view of a portion of a sash in its relation to the windowframe and showing in dotted lines an illustration of the practical application of my fastening to a window-cord, one end being held by said inserted fastening in the windowsash and the other attached to the weight suspended thereby in the usual pocket in the window-frame and running over a sheave in the common and well-known manner.

Referring to the drawings, A represents the blank or piece of'elastie metal from which my fastening is formed, composed, preferably, of sheet-steel having a proper degree of elasticity and having indented edges B and B and a small friction-point (l raised on the outer surface. The edges D and D are of unequal length, so that when the fastening' is completed by bending said blank into the requisite form, as shown in Figs. i2 and 3, it will taper from D to D. The upper side from point C either way is nearly a semicircle and from there down to the infolding of the indented edges B B the curve is straightened or 'iiattened somewhat and the indented edges infold and stand open or apart sufliciently to receive the cord E between them, as shown in Figs. 4 and 5. This form having the sides thus liattened when the fastening is pressed small end foremost into the hole F, bored in the sash C, relieves the lateral strain upon the weaker portion of the sash at that point and brings it more upon the stronger part in the direction of the length, and thus avoids danger of splitting the wood.

Before the fastening is pressed or driven into the hole F in the sash G, as shown in Figs. 4 and 5, the cord E is placed near its end between the indented edges B and B of the fastening, which is then normally expanded sufliciently to receive the same, and then by entering' its small end in the bore F in the sash in position to carry the cord properly into the sash-groove G and forcing' the fastening home into the bore the increasing size of the body as it advances will cause the indented edges to approach each other and press upon the cord and secure a firm grip upon the same, as shown in Figs. 4 and 5. No tying' or knotting of the cord is necessary, as when the knot is made to do service as the fastening', and consequently there is considerable saving' in material and in valuable time. When a knot is alone used, as is most commonly done, to fasten the cord in the sash it chafcs upon the unprotected wood and wears it away in use and impairs the durability of the sash and makes much repairing' necessary, while my simply-constructed metallic fastening serves the double purpose of quickly, economically, and securely attaching the cord to the sash, and at the same time aifords a protective bushing for the hole in the sash, and thus increases the durability of the latter.

When a chain E is employed in place of a sashcord,my fastening is vequally well adapted to that. In that case it grips the second link from the end of the chain, while the lirst link stands within the hollow of the fastening' and athwart the meeting' edges thereof, as illustrated in Fig. 6.

The friction-point C on the outer surface of the fastening is forced into the wood when the fastening is driven into the hole in the sash and increases the friction between the IOO IIO

the usual bore in the sash, will contract upon the cord and carry it into place and securely fasten it therein as specified.

Q. A sash-cord fastening composed of a suitable piece of elastic metal bent to form a conic shell and having indented and infolded edges adapted to seize and securely hold the cord between them, When the fastening` is forced into place in the sash, as specified.

THOMAS HAVLOCK KINGSTON.

Vitnesses:

MAXWELL T. SMITH, EUGENE HUMPHREY. 

